摘要
本文用模糊集从属函数方法,对1976年唐山7.8级地震和宁河河6.9级地震前华北地区20多个台站的地电阻率观测数据和1988年澜沧——耿马7.6级地震前腾冲台地电阻率观测数据以及1989年巴塘6.7级地震前甘孜台地电阻率观测数据进行了计算,共计处理5500多个数据,从中提取了中期趋势与短临异常,并对唐山地震前地电阻率异常进行了概略分析。
By using the method of membership function of fuzzy set, the telluric resistivity data from more than 20 stations in North Chirm before the 1976 Tangshan earthquake (M=7.8) and Ninghe earthquake ( M = 6.9 ) have been calculated in this paper. The telluric resistivity data from Tengchong station before the 1988 Lancang-Gengma earthquake (M=7.6) and from Ganzi station before the 1989 Datang earthquake (M = 6.7) have also been calculated. The obtained results show that the short-term and imminent. anomalies can be recognized obviously. Lastly, the characteristic of anomalous telluric resistivity before Tangshan earthquake has been analysed briefly.
出处
《地震研究》
CSCD
北大核心
1991年第2期104-111,共8页
Journal of Seismological Research
关键词
地震
强震
前兆
地电阻率
模糊识别
Telluric resistivity
Fuzzy recognition
Earthquake precursor
